This Day in History: 0000-09-28

28 Sep – Filipino guerillas in a surprise attack killed 78 soldiers of the 9th US Infantry in the Balangiga massacre (1901).
28 Sep – Sir Alexander Fleming discovered penicillin at Saint Mary’s Hospital in London when he noticed a petri dish contaminated by blue-green (Penicillium notatum) mold with a halo of impaired staphylococcal growth around the mold (1928).